Car-underframe.



C. E. DATH.

CAR UNDERFRAME. APPLICATION FILED .IAN-8,1918

' INVENTOR. bar/65 E. 70 fb w ff Patented an. 7, 1919.

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- cHazY, NEW Yoan.

i Specification of Letters Patent.

Appucauqn meu January s, 191s. serial No. 216,879.

To all 107mm tlmay concern: v

Be it known that I, DATH, a

` citizen of the United States, residing at Chicago, in the'county of Cook and Stateof Illinois, have :invented a certain new and useful Improvement in Car-Underframes, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification. This invention relates to improvements 1n carunderframes. f I

One object of the invention is to provide a comparatively cheap reinforcement for car wood underframes so asto adapt the saine for the heavier service required in modern practice.

' ment.

Another and more specific obj 'ect'- of the invention is to provide a draft arm structure for railroad cars which is composed of rolled plates and commercial shapes and so ar-l ranged as to effectively tie the wood center,

sills together against spreading and at the same time provide the requisite wider draft sill spacing for modern draft gear equip- In the drawing forming part of this specilication, Figure 1 -iS a top plan view of the improved draft arm construction shown in conjunction withr the car body bolster, all the sills and other wood members being` removed.' 'Fi 2 is a longitudinal, central,

vertical section from the end sill of the car to a point at the rear of the body bolster.

And Figs. 3, 4 and 5 are vertical, transverse,

sectional views taken respectively on the f lines 3 3, 4-4 and '5 5 of Fig. 2 and looking in the direction of the arrows. l In said drawing, 10`10 denote the woo center sills ofthe car extending from end toend thereof and running over the top of the body bolster-'11. At the end of the car, the same is shown as provided with a wood end sill 12, buiiing block 13, and 14 denotes the wood oor of the car. At the rear ofthe bolster, the usual wood sub-sills 15 are shown, the same terminating against the rear face of the bolster 11. v

As originally built, the car underframe also employed wood draft sills extending from the bolster to the end sill, but in my construction, the wood draft sills are omitted and the metal draft arm structure substituted therefor to provide the increased strength and wider sill spacing.

,V tions 19 of the plates lA--A are secured depending flanges 20-20 of a pair of oppositely arranged, longitudinally extending angle irons 21-21, all of which are securely 'Patented aan. 7, wie.

riveted together as by the series of rivets 22--22. Where the plates A-A extend over the bolster 11, securing plates 23 are eniployed having an inwardly and upwardly extended ange 24 riveted to the adjacent inclined portion 18 of the plate A. and a horizontally extending portion 25 having downturned end flanges fitting over and secured to the bolster l1. The inner ends of the vertical draft sill portion 17 are secured to the 'bolster 11 by suitable angle plates 26-26,

shown most clearly in Figs. 1 and 4. The

draft arm structure as an entirety is also secured at its front end to the end sill 12 by rright-angled plate 126, as clearly shown in At the rear of the bolster, portions of the plates A-A are extended outwardly and orizontally, as indicated at 27 and are secured between the center and sub-sills` as clearly indicated in Fig. 5.

Extending from the bolster to the end sill are reinforcing angle irons 28-28 each having a horizontal liange secured to the under si e ofthe corresponding center silland the vertical flange riveted to the adjacent portion of the plate A. It will be noted from an inspection of Figs. 3 and 4, that the center sills are cut away or beveled along their inner lower edges, as indicated at 29:-29, against which the lower portions of the inclined sections 18 rfit, this feature serving two purposes, one the solid bracing of the center sills and, two, permitting the wider spacing of the draft s1ll portions 17-17 so as to'accommodate modern types of draft rigging.' l

In the drawing, a well known type of tandem draft rigglng is conventionally illusings 30-30 secured to the draft sill portions 17; adraw bar 31;yoke 32; and springs 33, the parts being supported by suitable saddle plates 34.-34 bolted to the lower A lower portions beneath the. center sills to fianges 16 of the plates A. The sub-sills 15 are secured to the center sills by long sill bolts 35 and the angle `irons 28 are secured to the center sills by other shorter sill bolts 36. l

From the preceding description, it will be seen that the draft arm reinforcement which I have rovided may be cheaply manufactured rom rolled plates and structural shapes and can be built up as a unitary structure before being applied to the car, thus cheapening manufacturing and assembling costs. Furthermore, with the ridge structure formed by the inclined portions 18--18 and the T-shaped top, the draft arm presents great strength against both longitudinal and transverse or lateral vstrains so as to minimize tendency of the wood center sills to spread. By having the plates A`A lSecured to and abutting against the front and rear sides of the bolster, as hereinbefore described, the entire draft well adapted to resist the buflng and pulling strains transmitted thereto by t e gear under draft andy bufing actions.

I claim: v l

1. In car underframing, the combination lwith wood center sills, end sill, bolster, and

sub-sills terminating at the rear of the bolster, of a built-up draft arm including longitudinally extending plates having vertical form the draft sills between the bolster and end sill, said plates having upwardly and inwardly extending upper portions forming a longitudinal ridge between the center sills. 2. In car underframing,vthe combination with wood center' sills, end sill, bolster, and sub-sills at the rear of the bolster, of a builtup draft arm, said draft arm including a pair of plates united along their upper edges, said plates being secured to the center sills and having lower vertical portions adapted to form draft sills in front of the bolster. l

3. In car underframing, the combinationwith wood center sills, end sill, bolster, andsub-sills at the rear of the bolster, of a builtarm structure is y up draft arm, saiddraft arm including a pair of plates, each plate having a lower vertical ortion forming a draft s1ll andan up ward y and inwardly inclined upper portion, said upper inclinedportions being secured together and extending over and to the. rear of said bolster, said vertical draft sill portions 'terminating against the forward side 5ofthe bolster.

4. In car underframing, the 'combination with wood center sills beveled along their lower inner edges, end sill, bolster, and, subsills vat the rear of the bolster, of a pairof longitudinally extending plates, each having 4 a vertical portion located `forwardly of the bolster toform a draft sill, and an upwardly and inwardly inclined portion, said inclined portions extending from the end sill over the bolster toa point atthe lrear of the latter, vsaid inclined portions ofthe plates fitting against the beveled surfaces of the center sills whereby to 'space the draft sill portions of said plates wider than the spcing between the center sills proper. A l

5. In car underframing, the combination with wood center sills, end sill, bolster, and

sub-sills at the rear of the bolster, of a pair of reinforcing. plates having upwardly and inwardly inclined portions united at their upper edges extending from the end sill over the bolster to a`point at the rear of the latter, said plates having also depending vertical portions forward of the bolster to provide draft sills, and angle irons on the outer sides of said plates and .having their flanges secured to the bottoms of the center sills and to thel vertical draft sill `portions of said plates.

6. As an article of manufacture, a draft arm structure comprising: two plates, each l having a, lower vertical portion and an upwardly and inwardly inclined upper portion; a pair of angle irons secured to the upper edges of said plates; and angle irons secured to the outer faces of said vertical portions of said plates,fthe lower edges of said vertical portions o f the plates being flanged outwardly.

In witness that I claim the foregoing l have hereunto subscribed my name this 29th day ofDec., 1917.

' CHARLES E. DATH. 

